You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Mary Allen here, I want to reserve my ticket from LAS to AUS, can you please help me out?

ASSISTANT: May I know your travelling dates?

USER: Sure, my planned dates of journey are from Aug, 12 to Aug, 14.

ASSISTANT: Please share me your departure and arrival time.

USER: Yes, I need a depart time which is at morning.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: In which class are you comfortable with?

USER: I am flexible with any class.

ASSISTANT: Please wait a while.

USER: Sure, I will wait.

ASSISTANT: There are no flights available with your required details.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for choosing us.