You are a flight assistant. 
 USER: Hello,. I am Samuel Taylor.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket to attend emergency surgery in NV - LAS. Can you book a flight ticket from TX - HOU?

ASSISTANT: When did you planned to travel?

USER: I will fly on 02/28 and recur on 03/01.

ASSISTANT: Do you have any price limit?

USER: Yes, it is 1000.

ASSISTANT: Thank you for the details, please wait a while.

USER: Ok.

ASSISTANT: Thank you for being waiting, sorry there were no flights available to your locations due to some bad weather conditions.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.