You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I asses you the day?

USER: I am Patrica Brown. I am planning to visit my grandmother who is in Dallas, help me in booking my flight ticket from New-York NY-JFK to TX-DFW.

ASSISTANT: Sure, On what dates you have planned to travel?

USER: My travelling dates will be 04/12 to 01.14. My travelling dates will be 04/12 to 04/14.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, There is no flight found on your travel dates.

USER: Its ok, thank you.

ASSISTANT: Thanks for reaching us.