You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Ronald Roberts here. I want to attend a Marriage in Seattle. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are 11/27 and 11/29.

ASSISTANT: Could you please share me your airport codes?

USER: My airport codes are BOS and SEA.

ASSISTANT: Do you need any specifications?

USER: I would prefer single halt.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform that, there are no flights found on your given route.

USER: Anyway, thanks for the information.

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