You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Joshua Perez.

ASSISTANT: Joshua Perez, how may I render you?

USER: I am planing to meet my friend at Houston,will you help me in booing the flight ticket from PHL to HOU?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My preferable journey dates are Sept 01 and Sept 03.

ASSISTANT: Do you have any specifications?

USER: Make sure that my depart time must be in afternoon.

ASSISTANT: Do you have any other preferences?

USER: I need a flight with single connection.

ASSISTANT: Please give me a moment to check for available flights.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.