You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hi,. How can I aid you?

USER: I am Stephanie Carter. I want to attend IFA Awards event in San Francisco. Can you book a flight ticket for me?

ASSISTANT: Yeah, sure. Will you provide your journey dates with place?

USER: My origin and destination airport codes, BOS - SFO. And my journey dates on 09/09 to 09/11.

ASSISTANT: Fine, give me a minute.

USER: Ok.

ASSISTANT: Sorry to inform you,there is no ticket found. thank you for choosing us.

USER: It's ok, Thank you for the information.