You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to reserve a flight ticket from DFW to LAS?

ASSISTANT: Sure, can you please let us know your travelling dates?

USER: I want to fly on 05 May and return on 07 May.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a single connection flight.

ASSISTANT: May I know your name?

USER: I am Nancy Jackson.

ASSISTANT: There are no flights available on your travelling dates.

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

ASSISTANT: Thank you for approaching us.

USER: Thank you.