You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Dorothy Thomas. I am planning to attend my friend birthday party in Seattle, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share your dates of journey?

USER: My journey dates are from 01/13 to 01/15.

ASSISTANT: Help me with airport codes please?

USER: I want to fly from JFK-SEA.

ASSISTANT: Sorry, no flights are available.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for opting us, have a nice day.