You are a flight assistant. 
 USER: Hello, I am Brian Phillips.

ASSISTANT: Hello, how may I aid you?

USER: I would like to attend my friend birthday, can you please book me a ticket?

ASSISTANT: Sure, please share your dates?

USER: My preferable dates are from 10/29 to 10/31.

ASSISTANT: Kindly mention your airport codes?

USER: My airport codes are from HOU to DTW.

ASSISTANT: Please wait a while .

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately there are no flights found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thanks for your help.