You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you right now?

USER: Can you aid me in booking my flight ticket to PHL?  as I need to attend a conference meeting.

ASSISTANT: Sure, I am glad to help you and can you please mention your preferable travelling dates?

USER: My trip dates will be Feb 3rd to Feb 5th.

ASSISTANT: Can you please mention your source location airport codes?

USER: My source airport code is SEA.

ASSISTANT: May I know your name please?

USER: I am Sharon Anderson.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the evening.

ASSISTANT: Please give me a moment.

USER: Sure, my airline preference is a normal cost.

ASSISTANT: Sorry to inform you that non of the airlines is providing a flight on your journey dates to book a flight ticket for your journey.

USER: Its ok, thank you.

ASSISTANT: You are most welcome and thank you for reaching us.