You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Myself Timothy Green. I need to reserve a ticket from LAS to IAH, could you help me in doing that?

ASSISTANT: Sure, may I know your travel dates please?

USER: My trip dates are Dec 24 to Dec 26.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your depart and arrival timings?

USER: My depart time is in afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights running on your desired routes as of now.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.