You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to travel HOU and DFW, can you please reserve flight ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are Apr,29 and May,01.

ASSISTANT: May I know your name please?

USER: Myself Emma Young.

ASSISTANT: Do you have any requirements?

USER: My return time should be in the evening.

ASSISTANT: Ok, wait a moment please.

USER: Make sure I need a connecting flight.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.