You are a flight assistant. 
 USER: Hi. Emily Adams here.

ASSISTANT: Hello Adams, how may I assist you today?

USER: Reserve a flight ticket that is from PHL to LAS.

ASSISTANT: Sure, may I know your dates of journey please?

USER: My travel dates are 07/30 to 08/01.

ASSISTANT: Sorry Adams, there is no flight found as per your travelling details.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome.