You are a flight assistant. 
 USER: Hello, I am Patricia Robinson from Los Angeles.

ASSISTANT: Hello, how may I give assistance to you?

USER: Can you please check the availability of flights in between the points Los Angeles and Denver?

ASSISTANT: Sure, I am glad to help you. May I know your journey dates please?

USER: My journey dates are on 05/21 to 05/23.

ASSISTANT: Ok, let me share your selected airport codes.

USER: My source is Los Angeles, CA - LAX. I want to land at Denver, CO - DEN.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for choosing us.