You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I be at your service?

USER: I am Christopher Carter.

ASSISTANT: Ok.

USER: As I am a sport player, I want to participate in sport festival which is going to be held on 10/09. Can you help me in booking a ticket?

ASSISTANT: Sure, let me know your airport codes?

USER: Ok, my source airport is Houston, TX - HOU.

ASSISTANT: Ok.

USER: My destination airport is Boston, MA - BOS.

ASSISTANT: When you want to return?

USER: I intend to get back on 10/11.

ASSISTANT: Sorry, there were no flights running to your requested dates.

USER: Ok, not an issue.

ASSISTANT: Thanks for your approach.

USER: Thank you.