You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book my ticket from LGA to IAD. Can you please help me with booking a flight ticket?

ASSISTANT: Can you please help me with your travel dates?

USER: My travel dates are from July 13 to July 16.

ASSISTANT: Do you have any preferences?

USER: Sorry, my return travel date is July 15.

ASSISTANT: Ok.

USER: I need to book my ticket in economy class with connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No, thank's for asking.

ASSISTANT: May I know your name?

USER: My name is Helen Wilson.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Not an issue with that one, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.