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

ASSISTANT: Hello, how can I help you today?

USER: I would like to fly to Denver on 07/14 to participate in badminton tournament and  I intend to return on 07/16, can you help me in booking?

ASSISTANT: Sure, can you please provide me your airport codes?

USER: My source is Houston, TX-IAH and my landing point is Denver, CO-DEN.

ASSISTANT: How much can you afford for this journey?

USER: I can bare up to 200.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok , please confirm my ticket with this airline.

ASSISTANT: Thanks for reaching us.

USER: Ok, no problem. Thank you.