You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Christopher Williams.

ASSISTANT: How may I assist you?

USER: Can you help me in booking a ticket from JFK to DFW?

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned journey dates are 01/11 and 01/13.

ASSISTANT: Williams, no flights has been found on your trip dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for approaching us.