You are a flight assistant. 
 USER: Hello. I am Sandra Adams.

ASSISTANT: Hello, how may I be there at your service?

USER:  I would like to visit Lady Bird Lake at New York with my friend, please help me in booking a ticket from IAD to LGA. Could you please help me in doing that?

ASSISTANT: Sure, may I know when are you planning to make your journey possible?

USER: My travelling dates are 07/28 and return on 07/30.

ASSISTANT: Do you need a stop over?

USER: I need a direct flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Currently there are no flights going on your way.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.