You are a flight assistant. 
 USER: Hello. Myself Richard Mitchell.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a flight from LAX to HOU, can you help me in booking the flight ticket from Los Angeles?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my planned travel dates are Jan 13 and Jan 15.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome, have a great day.