You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I support you today?

USER: I am participating in New York marathon so, can you book a ticket from Houston?

ASSISTANT: Sure, when are you planning to travel?

USER: I have planned to travel on 11/16 and return back on 11/18.

ASSISTANT: Which airports do you prefer to take off and land on?

USER: My journey airport codes are IAH and LGA.

ASSISTANT: Do you prefer a halt with in your journey?

USER: Yes, I prefer a halt.

ASSISTANT: May I know your good name?

USER: My name is David Jones.

ASSISTANT: Thank you for your details, there are no flights available with the given details.

USER: No problem, I will try with another airlines. Thank you for the information.

ASSISTANT: Thank you for contacting us.