You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Perez.

ASSISTANT: How may I aid you today?

USER: Please find me a flight ticket from DEN to EWR to meet my old friend. can you help me?

ASSISTANT: Sure, do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Help me with the trip dates?

USER: My trip dates are 10/26 and 10/28.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: Ok, no problem. Thank you for your response.

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