You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: I am planning to visit Seattle, can you please reserve me a ticket from SFO to SEA?

ASSISTANT: Ok, I will help you with that. Can I know your planned trip dates?

USER: My planned dates of journey are Dec 25 and Dec 27.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer connecting flight for this trip.

ASSISTANT: May I know your name?

USER: My name is Sharon Hill.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.