You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you help me to book a flight ticket from AUS to DFW?

ASSISTANT: On which dates would you like to travel?

USER: I want to take off on 09 and return on 11 Feb.

ASSISTANT: Do you need a lay by in between the journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: My return should be in the morning.

ASSISTANT: May I know your good name please?

USER: I am Edward Johnson.

ASSISTANT: There are no flights found on your requested dates. Thank you for reaching us.

USER: Oh! that very sad to hear, thank you.