You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Emily Smith here.

ASSISTANT: Ok.

USER: I have to go New York for my film shooting purpose, can you please book a flight ticket from DFW to EWR?

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

USER: Ok, my itinerary dates are from 05/23 to 05/25.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

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

USER: Ok, no problem. Thank you or your help.

ASSISTANT: Welcome, have a great day.