Q_ When I have to explain to my friend about travel plan

Hi jean. I want to tell you about our travel plan. we have a little bit of a problem. hmm...the problem is that the airplane tickets for the period when we wanted to reserve are fully booked. yup. it’s their peak season this time of year. So we need to reschedule it. the first option is to postpone it till the following week. The tickets are actually cheaper then too!.
And...In the worst case, we can cancel our trip. I’ll call the travel agent to try and get a refund. trust me. so.. which one is the best for you man?

*... <- is put in for effect 
*native speakers say yup rather than yeap ;P 

I edited this thinking this was a very natural and casual conversation between and made it sound like how a native speaker would say things.

Q.i explained to my friend about air travel plan

Hi jean. I want to tell you about our travel plan. we have a little bit  problems. hmm the problem is that the airplane tickets had booked when I tried to get tickets.. . So we need to change our planing about particular journey

I think its enough write short but meaningful words