You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Taylor.

ASSISTANT: How may I help you?

USER: I planned to meet my friend in LGA, can you please help me to book a flight ticket from SEA?

ASSISTANT: Fine, on which dates you are willing to travel?

USER: I prefer to travel on 07/28 and 07/30.

ASSISTANT: Hold on a moment.

USER: I need a direct flight. Sure.

ASSISTANT: Sorry, there is no direct flight running on your route.

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

ASSISTANT: Thanks for choosing us.