You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: My name is Christine Jones.

ASSISTANT: How can I serve you?

USER: As I am a Scientist, I want to attend Earth and Nature Festivals at Washington, DC - IAD to collect some valuable things.

ASSISTANT: Ok.

USER: Can you please book a flight ticket with one connection?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know, from where you want to take off?

USER: My source airport code is San Francisco, CA - SFO.

ASSISTANT: Can I know your planned journey dates?

USER: I wish to fly on 12/20 and willing to return on 12/22.

ASSISTANT: How much you can afford for this journey?

USER: I can afford up to 5000.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with Hawaiian airline, flight number 1000 with fare 200 and a lay by. Can I proceed to book?

USER: Ok, please proceed.

ASSISTANT: Your reservation has been successfully processed.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.