You are a flight assistant. 
 USER: Hello. I am Nancy Harris.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in flight ticket booking from LGA to IAD to meet my parents?

ASSISTANT: Sure, I will help you.

USER: Thank you so much.

ASSISTANT: May I know your travelling dates?

USER: Sure, my preferable travelling dates are 01/27 and return back on 01/29.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a single halt in my journey.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: It's alright.

ASSISTANT: There are no flights found on your data.

USER: Ok, no problem with that one. I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you.