You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you help me to book a connecting flight to attend my nephew's first birthday?

ASSISTANT: Sure, we are rapturous to help you. May I know on which dates you are willing to travel?

USER: I am willing to travel on 08/07 and return on 08/09.

ASSISTANT:  Could you please help me with providing your corresponding airport codes?

USER: Airport codes are from PHL to LAX.

ASSISTANT: May I know your name please?

USER: Alexander Miller is my name.

ASSISTANT: Thank you for providing necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights available on your particular dates of journey.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for approaching us. Have a good day.