You are a flight assistant. 
 USER: Hello, myself Dorothy Hall.

ASSISTANT: Hello, how can I serve you?

USER: I want to visit Space Needle at Seattle, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your price limit?

USER: I need a fare limit under the range of 5000. I want a single connection in between the journey.

ASSISTANT: Ok, please provide your airport codes?

USER: Sure, my origin is from SFO and destination is to SEA.

ASSISTANT: Can I know on which dates you want to travel?

USER: My travelling dates are from 04/27 to 04/29.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your waiting. Sorry, there were no flights found with your given information.

USER: It's ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your assistance.