You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Katherine Collins here. I need to schedule my trip to travel Philadelphia. Can you please help me in reserving the ticket from EWR to PHL?

ASSISTANT: Sure, may I know planned travel dates to check for the flight availability?

USER: Thank you, I am planning to departure on 05/06 and please book my return ticket also on 05/08.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: It's alright.

ASSISTANT: Here, there are no flights available for your desired dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.