You are a flight assistant. 
 USER: Hi. Anna Thompson here.

ASSISTANT: Hello, how can I aid you now?

USER: Reserve a flight ticket that is from EWR to DFW.

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: My travel dates are from 11/03 to 11/05.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your requested dates.

USER: That's not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.

ASSISTANT: You are welcome.