You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Please book me a ticket from DEN to SEA to meet my family.

ASSISTANT: Sure, can you share me your trip dates?

USER: I have planned to travel on May 01st and return on May 03rd.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Can I have your good name?

USER: Myself Anthony Thompson.

ASSISTANT: Sorry, no flights are found on your trip dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.