You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Rachel Walker.

ASSISTANT: How can I assist you?

USER: I have a plan to meet my friend. Can you help me for booking a flight ticket from BOS to EWR?

ASSISTANT: Sure, can you please share your trip dates?

USER: My trip dates 06/17 till 06/19.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.