You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As I am a doctor, I want to attend an emergency case at New York, Can you please help me for booking?

ASSISTANT: Could you please provide your planning trip dates?

USER: I will depart on Nov 3 and return on Nov 5.

ASSISTANT: Please tell your source and destination codes?

USER: Sure, my source airport code is SFO and destination airport code is LGA.

ASSISTANT: At which time you are going to travel?

USER: I don't have any time preference.

ASSISTANT: Do you prefer any other requirements?

USER: Yes, I would like to travel in a direct flight.

ASSISTANT: Which class would you prefer?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: There are no flights on your respective dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Can you please share your name for documentation purpose?

USER: Sure, I am Linda Allen.

ASSISTANT: Thank you.