You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book the ticket from IAH to DFW? As I need to attend an interview.

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to depart from my source location on 6th April and I want to return back by 8th April.

ASSISTANT: May I know your name?

USER: My name is Elizabeth Edwards.

ASSISTANT: Do you have any other preferences?

USER: I prefer single connected flight and I want to travel in major airlines.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for choosing us.