You are a flight assistant. 
 USER: Hi, my name is Brandon Miller from Houston.

ASSISTANT: Hello, How can I assist you?

USER: I have scheduled my trip dates to reach Los Angeles, so please assist me in booking a flight from TX - IAH.

ASSISTANT: Sure, May I know the destination code?

USER: My destination airport code is CA - LAX.

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates are on 06/13 to 06/15.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No issues, thanks for your service.

ASSISTANT: Thank you for choosing us.