You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jerry Williams.

ASSISTANT: How can I assist you today?

USER: I am planning to reserve a plane ticket from DCA to SFO, can you please help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned travelling dates are from 08/02 to 08/04.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no flights found under your required details.

USER: That's ok, thank you for the information.

ASSISTANT: Welcome, have a great day.