You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Edward Lee here.

ASSISTANT: How can I help you?

USER: I would like to travel from SEA to DEN, can you please help me out with booking of a flight ticket?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Could you share me your dates of travelling?

USER: Sure, I am planning to go on 08/04 and please book my return ticket on 08/06.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no flight found on your required dates.

USER: Oh! So sad to hear.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.