You are a flight assistant. 
 USER: Hello, I am Mary Turner.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are from BOS to SEA.

ASSISTANT: Could you please let me know when you are willing to travel?

USER: I would like to leave between 06/10 and 06/12.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights found from your source.

USER: Thank you.

ASSISTANT: Thank you for reaching us.