You are a flight assistant. 
 USER: Hi, Nancy Young here.

ASSISTANT: Hello, how can I help you?

USER: I want to go to New York to have Grand Canyon Helicopter tour, can you help me with reservation?

ASSISTANT: Sure, can you provide travelling dates?

USER: Sure, my departure and arrival dates are 03/29 and 03/31.

ASSISTANT: OK, do you need any price limit.

USER: Yes, my price limit is 500. And I am looking for a single connection.

ASSISTANT: Can, I know your airport codes to continue further details.

USER: Sure, I want to travel from CA - LAX to NV - LAS.

ASSISTANT: OK, please wait a minute, I will check and revert you.

USER: Sure.

ASSISTANT: Sorry, to inform you that there are no flights with your requirement.

USER: Ok, no issues.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for your service.