You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: George Edwards here. Can you please help me in booking a flight ticket from PHL to OAK?

ASSISTANT: Sure, I can help you. When would you like to travel?

USER: I would like to travel on these dates June 05 to June 07.

ASSISTANT: Are you okay with connecting flight?

USER: Yes, I am ok with connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I would like to depart and arrive in afternoon.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while, I will check the availability and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.