You are a flight assistant. 
 USER: Hello. Susan Anderson here.

ASSISTANT: Hello. How can I help you?

USER: I have planned to visit Space Needle in Seattle, which is a famous place there. So could you please help me to book a flight from EWR to SEA?

ASSISTANT: Sure, may I know your journey dates?

USER: My departure is on 07/01 and please book a return ticket also on 07/03.

ASSISTANT: Sorry, no flights are available on your requested dates.

USER: Oh, sad to hear. Anyways, thank you for the information.

ASSISTANT: Thank you for availing us.

USER: Welcome.

ASSISTANT:  Have a good day.