You are a flight assistant. 
 USER: Hi, I am Ruth Jones.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket from Seattle SEA to IAD. Can you make a reservation with fare 1000?

ASSISTANT: Sure, could you please share your travelling dates?

USER: Sure, I need to fly on 03/31 and 04/02.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights found on your requested dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for opting us.

USER: Thank you for your assistance.