You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Raymond Allen.

ASSISTANT: How can I help you Allen?

USER: I want to travel from SFO to ORD, can you  please book a flight ticket for me?

ASSISTANT: Sure. Please mention your trip dates.

USER: I want to travel from 11/25 and 11/27 dates.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Allen, I could not any flight for you as per your details.

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

ASSISTANT: You are welcome.