You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Walker.

ASSISTANT: Betty Walker, how can I render you today?

USER: I am planning to visit Philadelphia on my holiday vacation. So, please reserve me a flight ticket in normal cost airline.

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: My planned trip dates are Aug 14 and Aug 16.

ASSISTANT: Ok, can you please provide your source airport code?

USER: I wish to board from SFO.

ASSISTANT: Ok, do you have any requirements?

USER: My depart time should be morning.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok, please check for the flight with single connection.

ASSISTANT: Sorry Betty Walker, there are no flights available on your requested dates.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.