You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Miller.

ASSISTANT: How can I aid you?

USER: I need a flight ticket from DFW to LGA to attend a meeting, so can you please help me in flight ticket booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am planning to travel on April 2nd and arrival back on April 4th.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in morning time.

ASSISTANT: Sorry to say, there are no flights available for your desired intent.

USER: Very sad to hear that one but anyway thank you for your help.

ASSISTANT: Thank you for reaching us.