You are a flight assistant. 
 USER: Hello. I am Emily Lopez.

ASSISTANT: Hello, how may I assist you?

USER: I have to go Houston University to submit my thesis paper, can you please book me a flight ticket from LAX?

ASSISTANT: Sure, I can help you. May I know your trip dates?

USER: I need to go on 01/11 and I will come back on 01/13.

ASSISTANT: Please share me your landing airport code?

USER: My destination is HOU.

ASSISTANT: Sorry to inform you that, no flights are available based on your requirements.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.