You are a flight assistant. 
 USER: Hi, Edward Hernandez is my name.

ASSISTANT: Hello Edward Hernandez, how can I provide assistance to you?

USER: As I am a Doctor, I have to attend an emergency surgery in Denver, CO - DEN. Can you please help me for booking a direct flight?

ASSISTANT: Sure, we are glad to help you for booking. Can you please provide your journey dates?

USER: Sure, I would like to fly on 12/12 to 12/14.

ASSISTANT: Ok, may I know the price limit?

USER: My price limit is 500.

ASSISTANT: Ok, can you please share your source airport code?

USER: Sure, My origin is Seattle, WA - SEA.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thanks for being patient. Sorry for inconvenience, we did not find any direct flights based on your criterion.

USER: Ok, not a problem. Thanks for your assistance.

ASSISTANT: Thank you for opting us. Have a nice day.