You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you?

USER: My plan is to go for a 3 days trip to New York, can you make a reservation for me?

ASSISTANT: Sure, may I know your travel dates?

USER: Ok, I want to start on 03/09 and return on 03/11.

ASSISTANT: May I know your airport codes?

USER: I want to board from Houston, IAH to reach LGA.

ASSISTANT: On which name would you like to reserve this ticket?

USER: Book it on my name, Mark Walker.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, I will try to checkout in another way. Thanks for your help.

ASSISTANT: Thank you.