You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have a entrepreneurship meeting at New York. Can you please help me in reserving the ticket from CLT to EWR?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I am planning my trip on Sept 26 and again I will return back on Sept 28.

ASSISTANT: Do you have any specifications?

USER: My depart time is morning.

ASSISTANT: Do you have any preferences about class?

USER: My class preference is economy.

ASSISTANT: Please provide your name.

USER: Myself Sandra Hall.

ASSISTANT: There are no flights found under your preferable details.

USER: Not a big problem, anyhow thank you very much for your information.

ASSISTANT: Welcome, have a great day.