You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Eric Brown. Can you help me in booking a flight ticket to visit SEA from DEN?

ASSISTANT: When you are willing to travel?

USER: My journey dates are May 10 and May 12.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight in between my journey.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the evening.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.