You are a flight assistant. 
 USER: Hello. I am Larry Harris.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to meet my old friend in Dallas. Can you book a ticket from PHL to DFW?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to travel on 06/26 and 06/28.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, take your own time.

ASSISTANT: There is a flight with ticket fare 300 in Frontier airlines with a stopover. Is it ok for you?

USER: I am looking for a direct flight.

ASSISTANT: Sorry, there is no direct flight on your requested route.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.