You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I have planned trip to SEA, so I would like to book a ticket from BOS.

ASSISTANT: Sure, may I know your itinerary dates?

USER: My travel dates are as follows July 10 and July 12.

ASSISTANT: Do you have any specifications?

USER: I would like board a connecting flight with economy class.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: May I know your name?

USER: My name is Elizabeth Miller.

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

USER: No Problem, I will take another alternative.

ASSISTANT: Ok.