You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to travel TX - HOU from DC - IAD. Can you book me a flight ticket for me?

ASSISTANT: Ok, can I know your travel dates?

USER: My travel dates are 09/11 and 09/13.

ASSISTANT: Sorry to say this, no flights as per your details.

USER: Oh! it's ok I will go with another alternative. Thank you for the information.

ASSISTANT: You would like to travel with other dates. Ok, that's fine. Thank you for contacting us. May I know your name?

USER: Yes, myself Margaret Adams.

ASSISTANT: Adams, have a good day.