You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to visit Dallas to meet my uncle, please help me in booking a ticket from HOU to DFW.

ASSISTANT: Sure. May I know your class preference please?

USER: I prefer an economy class.

ASSISTANT: May I know your name please?

USER: My name is Timothy Campbell.

ASSISTANT: Tell me your travel dates please?

USER: My planned travel dates are on Mar 8 and Mar 10.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart in the morning and return in the evening.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: Sorry there no flights available in the morning time.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you.