You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need flight ticket booking from HOU to EWR to attend a seminar, so can you please help me with booking?

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

USER: Thank you and my planned travelling dates are Mar 26 and I will return back on Mar 28.

ASSISTANT: Do you have any specifications about flight connections?

USER: I am ok with any flight.

ASSISTANT: Do you have any preferences about flight timings?

USER: I would like to depart in the evening time and return back in the morning time.

ASSISTANT: Please mention your name.

USER: Sure, my name is Charles Martinez.

ASSISTANT: There are no flights found under your preferable details.

USER: No problem, I can prefer any other source to travel. Thank you for your help.

ASSISTANT: Welcome, have a great day.

USER: Welcome.