You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Nicole Rodriguez. I am planning to book a ticket from JFK to IAD. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I am mirthful to help you. May I know your depart and arrival dates?

USER: I am planning to travel on May 03 and return back on May 05.

ASSISTANT: Ok, please wait for a minute, I will get back to you.

USER: Yes, my depart time is evening.

ASSISTANT: Sorry, there were no flights available which departs in the evening time.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for contacting us.