You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Deborah Moore.

ASSISTANT: How may I assist you?

USER: Please, book me a plane on 04/23 to Seattle, SEA.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your boarding point?

USER: My nearest airport to board is San Francisco, SFO.

ASSISTANT: When will you return from Seattle?

USER: I will return on 04/25.

ASSISTANT: Thank you for sharing the details.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights running on your journey locations.

USER: Ok, I will choose other airline. Thank you for help.

ASSISTANT: Thank you for opting us.